Parallel Transfer Mode 1

The second data transfer method relies on both machines having bi-directional parallel ports, rather than output-only ``printer'' ports. This allows byte-wide transfers, and avoids reconstructing nibbles into bytes. This cable should not be used on unidirectional ``printer'' (as opposed to ``parallel'') ports or when the machine isn't configured for PLIP, as it will result in output driver conflicts and the (unlikely) possibility of damage.

The cable for this transfer mode should be constructed as follows:

STROBE->BUSY 1 - 11 D0->D0 2 - 2 D1->D1 3 - 3 D2->D2 4 - 4 D3->D3 5 - 5 D4->D4 6 - 6 D5->D5 7 - 7 D6->D6 8 - 8 D7->D7 9 - 9 INIT -> ACK 16 - 10 AUTOFD->PAPOUT 14 - 12 SLCT->SLCTIN 13 - 17 GND->ERROR 18 - 15 extra grounds are 19*,20*,21*,22*,23*,24* GROUND 25 - 25 * Do not connect these pins on either end

Once again, if the cable you are using has a metallic shield it should be connected to the metallic DB-25 shell at one end only.